JPS58220020A - Method and device for removal of bridge in grain hopper - Google Patents

Abstract

PURPOSE:To smooth exhaust of grains from a hopper by sending gas intermittently by pressure into the hopper, by fluidifying the grains in the hopper and by eliminating thereby attachment of the grains to the hopper walls or bridging of the grains owing to mutual attachment. CONSTITUTION:A chamber 6 is furnished outside the inclined wall 5a of a hopper 5, and equipped with an inlet 8, which is in communication with a means 7 to send gas into this chamber by pressure intermittently. This inclined wall 5a is provided with two or more flow-in holes 9, which allows the gas introduced into the chamber 6 to flow in the hopper 5 dispersed. If ice grains etc. are cast in the hopper 5, a dry gas cooled below 0 deg.C is sent into the hopper 5 by a pressure sending means 7 through the chamber 6 and flow-in hole 9 in diverged state. Thereby the air will flow around in the hopper 5 to prevent attachment of ice grains to the internal wall of the hopper 5 and also mutual attachment of the grains. Thus the intended purpose is attained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for removing cross-linking in a granule hopper that exclusively stores and discharges granules, and particularly relates to a method and apparatus for removing cross-linking that occurs in a granule storage tank by intermittent full gas inflow into the hopper. The present invention relates to a method and apparatus for removing crosslinks in a granular hole i9, which can efficiently promote the discharge of granules.

Here, the term "granules" refers to objects with relatively strong adhesion, such as ice particles.

Generally, the particles in the container undergo a crosslinking phenomenon. This crosslinking phenomenon is caused by the adhesive force and frictional force of the particles.
This is a phenomenon in which a certain layer within a granule generates a supporting force sufficient to balance the pressure of the granules above it, and maintains a static balance even if the supporting force from below that layer decreases. When discharging granules from one part of the container using full gravity, blockage may occur.
. Conventionally, a device having a structure shown in FIG. 1 has been known as a device for eliminating this cross-linked material and promoting the discharge of granules.

A pair of stirring plates 2 arranged in the same direction inside the hopper 1 are oscillated by an air cylinder 3 to appropriately stir the granules.

However, with this configuration, grains wrap around the base side of the stirring plate 2, making it impossible to expect smooth rocking, which is especially difficult for easily damaged materials such as ice grains, and the structure is complex, resulting in failure. The drawback is that there are many problems and maintenance and inspection are troublesome.

In view of these drawbacks, the present invention provides a gas inflow hole in the inclined wall of the hole, through which the gas intermittently flows, causing the particles to flow and creating a separation force that counters the adhesion force. To provide a method and device for removing crosslinks in a granule hopper, which can eliminate crosslinks due to wall surface N, mutual arrival of granules, etc. in January, and promote discharge of granules as much as possible. A preferred embodiment of the present invention will be explained below with reference to accompanying drawings.

As shown in FIG. 2, a hollow chamber 6 of which the inclined wall is a part is provided outside the inclined wall 5a of the hopper 5 along the inclined wall 5alC, and intermittent gas is pumped into the hollow chamber 6. An inlet port 8 communicating with the pumping means 1 is formed. And the inclined wall 5 of the hole /-,05 forming a part of the hollow chamber 6
A plurality of inflow holes 9 are provided to allow the gas introduced into the ai/ic nitrogen chamber 6 to disperse and flow into the gas tank 5 (
It is. As shown in FIGS. 3 and 4, this inflow hole 9 is formed by making two cuts t in the inclined wall 5a toward the discharge port 5bvc to form a cut section, and press the cut section 10 into the hopper. It is formed by making a recess.

Therefore, the inlet holes 9 are formed on both sides of the raised notch 10, but in the embodiment, the raised notch 10 is made into a chevron shape to further provide a diversion effect. A wire gauze 11 with a fine mesh is stretched over the outer surface of the inclined wall 5a in which the inflow hole 9 is provided to prevent particles from flowing into the hollow chamber 6 through the inflow hole 9.

Regarding this device having the above-mentioned configuration, an ice particle will be described as an example.

The ice grains introduced into the hopper 5 by appropriate means are stored at a temperature below zero and are discharged from the outlet 5b by gravity as appropriate or continuously. Ice grains have a lot of fine powder compared to other hard granules, and the fine powder forms an adhesion layer on the wall rfn of the hopper 5, and as soon as the adhesion layer is formed, larger particles tend to stick to it. There is.

In addition, some of the ice grains melt due to the heat of abrasion, and this melted water acts as an adhesion liquid and solidifies the ice grains, so that the adhesion is extremely strong and crosslinks are easily formed.

Therefore, the discharge port 5b often becomes closed.

Therefore, first, the inlet 8 is inserted into the hollow chamber 6 provided with the inclined wall 5alC.
Dry gas cooled to below zero degrees from the pressure feeding means 1 through the
911 pumps air intermittently. The pumped air fills the hollow chamber 6 and is dispersed into each of the notches of the chevron. Then, the water is divided into two directions on one side, in total in four directions, and flows into the inlet hole 9 and into the inflow hole 5. The divided pressurized air causes the ice particles to flow thoroughly from the lower part of the hopper 5 to the upper part, and expands the entire ice particles.
It is exhausted from b. When the pressurized air stops, the air pressure inside the hopper 5 decreases, causing the entire ice grains to shrink.

When this air pressure feeding and stopping is repeated, that is, when nitrogen intermittently flows into the hopper 5, the entire grain expands and contracts, causing a large force to be applied between the ice grains or to the ice grains that are about to touch the wall surface. Become.

Therefore, the force due to the expansion and contraction acts on the ice grains as a separating force against the adhesion force and frictional force that form the bridge, peeling off the adhering layer of fine powder and separating the ice grains to remove the bridge. Can be done.

The intermittent air may flow into the hopper 5 during discharge,
Further, it is more effective if the inflow hole 9 is provided in the upright wall 5d other than the inclined wall 5a.

FIG. 5 shows a modification of the inflow hole 9, in which the inlet hole 9ak is formed in the hopper 5 facing parallel to the inner surface of the inclined wall 5a by making all the cuts into one and recessing it in the same way. It is designed to give a swirling flow to the gas. In the embodiment, the cut is inclined with respect to the circumferential direction so that the swirling flow reaches the lower part of the hopper. This makes it possible to remove the adhering layer of fine particles particularly attached to the surface of the inclined wall 5a along the circumferential direction, thereby further increasing the crosslink removal efficiency.

In both embodiments, the intermittent inflow of gas is particularly necessary because the particles are highly adhesive ice particles, and the expansion and contraction effects completely eliminate the adhesion and effectively remove the bridging tray. Therefore, it goes without saying that the same effect can be applied to other adhesive particles, and it can also be applied to ordinary particles and even powders.

In summary, the present invention exhibits the following excellent effects.

(1) In the hydraulic method, all of the gas intermittently flows into the hopper and the granules are completely fluidized, so the granules as a whole expand and contract, making it possible to efficiently remove cross-linked grapes. The process can be carried out reliably without damaging the grapes.

In addition, according to this device, since the pressure feeding means and the inlet provided in the hopper are equipped with metal fittings, the device can be used for black powder, and since the pressure feeding means is installed outside the hopper, it is not affected by the granules. In addition, since gas is allowed to flow in from the inclined wall, cross-linking of the particles can be completely removed.

[Brief explanation of the drawing]

FIG. 1 is a schematic vertical sectional view and a plan view of a conventional crosslinking prevention device or granule acceleration device, FIG. 2 is a schematic vertical sectional view of a crosslinking prevention device in a granule hopper according to the present invention, and FIG. The Ill-Illl wave line diagram in the figure, Figure 4 is the IV- in Figure 3.
The enlarged sectional view taken along the line IV and FIG. 5 are plan views showing other modifications of the inflow hole according to the present invention. In addition, in the figure, 5 is a hopper, 5a is an inclined wall, 1 is a pressure feeding means, and 9
is the inflow hole. Patent applicant Nobuo Kinutani, agent of Ishikawajima Banreki Heavy Industries Co., Ltd., patent attorney Figure 1 (b) Figure 2 Figure 3 Continued from page 1 0 Author Shuji Miyahara 1 Shin-Nakahara-cho, Isogo-ku, Yokohama City Address Ishikawajima Harima Heavy Industries Co., Ltd. Yokohama No. 1 Factory

Claims (2)

[Claims] (1) A method for removing crosslinks in a granule hollow/flat characterized by intermittently pumping gas into a hopper and causing the entire granules in the hopper to flow by the pumped gas. (2) It is characterized by being completely equipped with a pressure-feeding means for manually pumping the gas, and an inflow hole provided in the inclined wall of the hopper to allow the gas pumped by the pressure-feeding means to flow into the hopper. Crosslink removal equipment for granular hollow and flat particles.